- Dongying Tianrui Petroleum Technology Co., Ltd.
- Downhole Tool
Shandong
- Nantong Percent Precision Manufacturing Co., Ltd
- Petroleum Drilling Tools; Handling and Wellhead Tools
Jiangsu
- Qingdao Hna Oilfield Equipment Manufacturing Co., Ltd.
- Mud Pump Parts
Shandong
- Shandong Weima Pumps Manufacturing Co., Ltd
- Sucker rod pump, Oil lifting equipment, Sucker rod pump parts, Sucker rod pump, Rodless complete oil production system
Shandong
- Yantai Kytider Energy Equipment Technology Co., Ltd.
- Drill Pipe, Gate Valve, Petroleum Equipment, Christmas Tree, Frac Tree, Frac Hose, Bop, Mobile Housing, Chemical for Oilfield
Shandong
- Huludao Boyu Petroleum Machinery Co., Ltd.
- Bucking Machine, Hydro-static Testing Machine, Pre-tightening & Screwing Unit, Straightening Machine
Liaoning